Extreme weather threatens the whole of continental Europe, turning the lives of its citizens inside out. The French government calls Professor Mortimer to help solve this enigma. Mortimer travels near Paris to visit his friend Professor Labrousse, the chief French meteorologist.

Extreme weather threatens Europe. When France calls on Mortimer to help solve this enigma, he goes to visit Professor Labrousse, chief French meteorologist. After the driver Labrousse sends to pick up Mortimer disappears, our friend is the prime suspect. Mortimer contacts Captain Blake to help him with this tricky situation. Then Blake disappears. Mortimer and Labrousse have two missing-person cases to investigate. They soon discover that the disappearances are linked to the climatic catastrophes.